How do I fix attempt to index nil with 'GetPivot'

[OzeanSyler (SomeRandomNoob)]

Hi!
I need help with this error attempt to index nil with ‘GetPivot’ idk how to fix it .
I want the model to spin, if anyone knows how to fix it pls help!
The subject is a model,
here is the script:

local function spin(Subject)
	while true do
		Subject:PivotTo(Subject:GetPivot() * CFrame.Angles(0, math.rad(15), 0))
		wait(0.01)
	end
end
return spin()

any help is appreciated!

[Lauri9]

I assume this is a module script so make sure when returning to remove the ()

local function spin(Subject)
	while true do
		Subject:PivotTo(Subject:GetPivot() * CFrame.Angles(0, math.rad(15), 0))
		wait(0.01)
	end
end
return spin